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Finding the Fourth Proportional to 77,656.40, 116,484.60 and 40,331.60

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Solution

The fourth proportional to 77,656.40, 116,484.60 and 40,331.60 is: 60,497.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,656.40 : 116,484.60 = 40,331.60 : x
  2. Step 2: Convert to fraction form
    77,656.40/116,484.60 = 40,331.60/x
  3. Step 3: Cross multiply
    77,656.40x = 116,484.60 × 40,331.60
  4. Step 4: Simplify right side
    77,656.40x = 4,698,010,293.36
  5. Step 5: Solve for x
    x = 4,698,010,293.36/77,656.40
  6. Step 6: Final answer
    x = 60,497.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.